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Submission #269828

# Submission time Handle Problem Language Result Execution time Memory
269828 2020-08-17T10:39:04 Z egekabas XOR Sum (info1cup17_xorsum) C++14
18 / 100
 1600 ms 34868 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
int ans = 0;
map<int, int> mpp;
int n;
vector<int> v;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    cin >> n;
    while(n--){
        int tmp;
        cin >> tmp;
        mpp[tmp]++;
    }
    for(auto u : mpp){
        if((u.ss-1)%4 == 0 || u.ss%4 == 2){
            ans ^= 2*u.ff;
        }
        if(u.ss%2)
            v.pb(u.ff);
    }
    n = v.size();
    for(int i = 0; i < n; ++i)
        for(int j = i+1; j < n; ++j)
            ans ^= v[i]+v[j];
    cout << ans << '\n';
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 640 KB Output is correct
2 Correct 8 ms 640 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 221 ms 5116 KB Output is correct
2 Correct 182 ms 4856 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 221 ms 5116 KB Output is correct
2 Correct 182 ms 4856 KB Output is correct
3 Execution timed out 1676 ms 34868 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 640 KB Output is correct
2 Correct 8 ms 640 KB Output is correct
3 Execution timed out 1681 ms 6644 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 640 KB Output is correct
2 Correct 8 ms 640 KB Output is correct
3 Correct 221 ms 5116 KB Output is correct
4 Correct 182 ms 4856 KB Output is correct
5 Execution timed out 1676 ms 34868 KB Time limit exceeded
6 Halted 0 ms 0 KB -